Blow-pipe



L. BORN.

BLOW PIPE.

(No Model.)

Patented Sept. 3, 1889.

UNITED STATES PATENT OFFICE.

LORENZO DORN, OF GLOVERSVILLE, NEIV YORK.

BLOW-PIPE.

SPECFICATION forming part of Letters Patent N o. 410,503, datedSeptember 3, 1889. Application filed July 11, 1888. Serial No. 279,611.(No model.)

To @ZZ whom it may concern.-

Be it known that I, LORENZO DORN, a citizen of the United States,residing at Gloversville, in the county of Fulton and State of New York,have invented a new and useful Improvement in Combined Burner and Blow-Pipe for Laboratory Use, of which the following is a specification.

My invention relates to acombined burner and blow-pipe for laboratoryuse7 having for its objects to provide a simple, cheap, and effectiveblow-pipe, which employs the ordinary illuminatinggas and forms a simpleburner, (when not in use as a blow-pipe,) over which test-tubes, dsc.,may be heated in the ordinary way.

The invention consists in a certain novel construction and combinationof devices, fully set forth hereinafter in connection with the drawings,and specifically pointed out in the appended claims.

In the accompanying drawings, Figure 1 is a perspective view of theimproved burner. Fig. 3 is a longitudinal central sectional view of thesame. Fig. 2 is a central transverse sectional view. Fig. is a detailview on line a a: of Fig. 3.

Referring by letter to the drawings, A designates the base or support ofthe limproved burner, which is provided on its upper side with theregistering` bearings B B; and O designates a horizontal inlet tube,which is mounted in the said bearings, whereby it may rotate freely, andcommunicates at its center with a perpendicular tube or reservoir D. Anupwardly-convexed leaf-spring E is located under the inlet-tube and isaffixed at one end to the base, and the said spring bears again st theund er side of the tube, and thereby holds the same in the desiredposition, and holds the perpendicular tube or reservoir at the desiredangle to the horizontal plane.

A small combustion-tube F is affixed to the side of the tube orreservoir D near its upper closed end, and this combustiomtube isprovided at its base adjacent to the reservoir with the sideair-openings G G.

The air-pipe H is affixed to the rear side of the reservoir, and isprovided at its upper end with a tip I, which passes through the upperend of the reservoir and extends longitudinally through the center ofthe combustion-tube to within a short distance of its outer or free end,the bore of the said tip being reduced gradually to a very fine openingat its outer end. The lower end of the airpipe is provided with alaterally-extending curved extension or arm 7L, to which is attached theflexible tube K, provided at its free end with the mouth-piece L.

The reservoir D communicateswith the combustion-tube F through smallperforations M M, which are located in the side of the reservoir,respectively above and below the tip I, whereby the gas is deliveredinto the combustion-tube above and below the airpipe tip.

N represents a fiexible feed-tube, which eX- tends from the gas-supplyand is fitted on the open end of the inlet-tube C.

The operation of the device is as follows: The gas is conveyed by thefeed-tubeN to the inlet-tube O and reservoir D, in which it is stored insufficient quantity to provide a steady flow through the perforations MM, even though the supply is unsteady. The gas is delivered into thecombustion-tube through the perforations M, and as it passes through thetube it creates an inward current of air through the air-openings G G,and the gas be- Comes intimately mingled with the air as it passesthrough the tube, and therefore burns freely at its outerend. Airisforced through the blow-pipe by the operator, and the fine stream of airwhich is projected through the burning gas at the outer end of thecombustiontube by the air-pipe tip causes a more perfect combustion ofthe gas and draws the fiame to a fine point, which may be directed uponany desired point by arranging the reservoir at the desired angle.

It will be seen that the perforations M, which admit the gas into thecombustion-tube, are located on diametrically-opposite sides of theair-tip, and the air-openings G are also located ondiametrically-opposite sides of the said tip in a different plane fromthe perforations M, and therefore, when the device is used as anordinary burner, the gas becomes intimately mixed with air, so thatitburns freely and with a non-luminous flame at the outer end of thecombustion-tube.

The gas being supplied above and below the tip becomes spread around thetip as it ICO approaches the extremity of the combustiontube, whereby atthe point where combustion takes place a tubular or hollow flame isformed, the intensity of which is the same on all sides. The air beingsupplied on opposite sides of the combustion-tube out of the plane ofthe gas-supply perforations, these perforations do not act asescape-openings for the gas, as the latter is projected beyond them byits expansive force. The draft or current of air created by thispropulsion of the gas is supplied by the inflow ot' air through theopenings G. This air becomes mixed with the gas in passing through thetube, so that they reach the free end of the latter together,

and when the mixture is ignited perfect com-I bustion ensues and asubstantially non-luminous ame results.

It will be understood that the gas may be supplied through oneperforation; butin this case the iiame will be of greater intensity onone side than the other, and this is objectionable.

Having thus described the invention, I claimv l. In a burner, thecombination of the reservoir provided with a suitable inlet-tube and theindependent combustion-tube provided with air-supply openings G G, andcommunicating with the reservoir through small apertures arranged out ofthe plane of the said air-supply openings,substantially as specified.

2. In a burner, the combination of the reservoir, the independentcombustion-tube provided with air-supply openings G G and communicatingwith the reservoir through the perforations M M, which are arranged outof `the plane of the openings G, and the air-pipe tip passinglongitudinally through the combustion-tube between the said perforationsM M, and extending to the end of said tube, substantially as specilied.

3. In a burner, the combination of the reservoir, the combustion-tubecommunicating with the reservoir through the perforations M M, which arearranged, respectively, above and below the center of the saidcombustiontube and provided on opposite sides with airsupply openings GG, the air-pipe affixed to the reservoir and provided with a tip whichpasses through the upper end of the reservoir, passes between theperforations M M, and extends concentrically through the combustion-tubenearly to its outer end, and the -.flexible tube connected to theblow-pipe and provided with a suitable mouth-piece, substantially asspeciiied.

4. In a burner, the combinatiomwith'a suitable base or support A,provided on its upper side with the registering bearings B B, of thehorizontal inlet-tube mounted in the said bearings, the reservoirarranged perpendicuagainst the under side of the inlet-tube and vadapted to hold the same in the desired position, substantially asspecified.

5. The base A, provided with bearings B B, combined with a transversetube C, mounted in the said bearings, the combustion-tube communicatingwith the reservoir, and the blow-pipe connected to the combustion-tube,substantially as specied.- v

In testimony that I claim the foregoing as my own I have hereto affixedmy signature in presence of two witnesses.

LORENZO DOEN.

Witnesses:

LEONARD B. YALE, GEO. R. HUToHINsoN.

